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# Copyright 2006-2007 Nanorex, Inc. See LICENSE file for details.
"""
objectBrowse.py
@author: Will
@version: $Id$
@copyright: 2006-2007 Nanorex, Inc. See LICENSE file for details.
History:
Will wrote this and used it for debugging.
Bruce 071107 split it out of debug.py.
(It has an undefined reference, but presumably worked,
and is referenced by qt4transition.qt4die.
Therefore I didn't move it into outtakes or scratch.)
"""
import sys, types
### BUG: undefined variable Finder
# ==
def standardExclude(attr, obj):
# EricM commented out these two imports in Will's code,
# since they caused trouble for his import analysis
# and we couldn't tell what they were for
# (though I'm guessing from the comment below that the intent was
# to get these imports over with before turning on some sort of debug
# output that occurred during subsequent imports).
# [bruce 071107 comment]
##from MWsemantics import MWsemantics
##from GLPane import GLPane
# I am rarely interested in peeking inside these, and they create
# tons of output.
return False
class ObjectDescender:
def __init__(self, maxdepth, outf = sys.stdout):
self.already = [ ]
self.maxdepth = maxdepth
self.outf = outf
def exclude(self, attr, obj):
return False
def showThis(self, attr, obj):
return True
def prefix(self, depth, pn):
return ((depth * "\t") + ".".join(pn) + ": ")
def handleLeaf(self, v, depth, pn):
def trepr(v):
if v == None:
return "None"
elif type(v) == types.InstanceType:
def classWithBases(cls):
r = cls.__name__
for b in cls.__bases__:
r += ":" + classWithBases(b)
return r
# r = v.__class__.__name__
r = "<" + classWithBases(v.__class__) + ">"
else:
r = repr(type(v))
return "%s at %x" % (r, id(v))
if type(v) in (types.ListType, types.TupleType):
self.outf.write(self.prefix(depth, pn) + trepr(v))
if len(v) == 0:
self.outf.write(" (empty)")
self.outf.write("\n")
elif type(v) in (types.StringType, types.IntType,
types.FloatType, types.ComplexType):
self.outf.write(self.prefix(depth, pn) + repr(v) + "\n")
else:
self.outf.write(self.prefix(depth, pn) + trepr(v) + "\n")
def getAttributes(self, obj):
lst = dir(obj)
if hasattr(obj, "__dict__"):
for x in obj.__dict__.keys():
if x not in lst:
lst.append(x)
def no_double_underscore(x):
return not x.startswith('__')
lst = filter(no_double_underscore, lst)
lst.sort()
return lst
def descend(self, obj, depth = 0, pathname=[ ], excludeClassVars = False):
if obj in self.already:
return
self.already.append(obj)
if depth == 0:
self.handleLeaf(obj, depth, pathname)
if depth >= self.maxdepth:
return
if type(obj) in (types.ListType, types.TupleType):
lst = [ ]
if len(pathname) > 0:
lastitem = pathname[-1]
pathname = pathname[:-1]
else:
lastitem = ""
for i in range(len(obj)):
x = obj[i]
if not self.exclude(i, x):
y = pathname + [ lastitem + ("[%d]" % i) ]
lst.append((i, x, y))
for i, v, pn in lst:
if self.showThis(i, v):
self.handleLeaf(v, depth+1, pn)
for i, v, pn in lst:
self.descend(v, depth+1, pn)
elif type(obj) in (types.DictType,):
keys = obj.keys()
lst = [ ]
if len(pathname) > 0:
lastitem = pathname[-1]
pathname = pathname[:-1]
else:
lastitem = ""
for k in keys:
x = obj[k]
if not self.exclude(k, x):
y = pathname + [ lastitem + ("[%s]" % repr(k)) ]
lst.append((k, x, y))
for k, v, pn in lst:
if self.showThis(k, v):
self.handleLeaf(v, depth+1, pn)
for k, v, pn in lst:
self.descend(v, depth+1, pn)
elif (hasattr(obj, "__class__") or
type(obj) in (types.InstanceType, types.ClassType,
types.ModuleType, types.FunctionType)):
ckeys = [ ]
if True:
# Look at instance variables, ignore class variables and methods
if hasattr(obj, "__class__"):
ckeys = self.getAttributes(obj.__class__)
else:
# Look at all variables and methods
ckeys = ( )
keys = self.getAttributes(obj)
if excludeClassVars:
keys = filter(lambda x: x not in ckeys, keys)
lst = [ ]
for k in keys:
x = getattr(obj, k)
if not self.exclude(k, x):
lst.append((k, x, pathname + [ k ]))
for k, v, pn in lst:
if self.showThis(k, v):
self.handleLeaf(v, depth+1, pn)
for k, v, pn in lst:
self.descend(v, depth+1, pn)
def objectBrowse(obj, maxdepth = 1, exclude = standardExclude, showThis = None, outf = sys.stdout):
od = ObjectDescender(maxdepth = maxdepth, outf = outf)
if showThis != None:
od.showThis = showThis
od.exclude = exclude
od.descend(obj, pathname=['arg'])
def findChild(obj, showThis, maxdepth = 8):
# Drill down deeper because we're being more selective
def prefix(depth, pn):
# no indentation
return (".".join(pn) + ": ")
f = Finder(maxdepth = maxdepth)
f.showThis = showThis
f.prefix = prefix
f.descend(obj, pathname=['arg'])
# python -c "import debug; debug.testDescend()"
def testDescend():
class Foo:
pass
x = Foo()
y = Foo()
z = Foo()
x.a = 3.14159
x.b = "When in the course of human events"
x.c = y
x.d = [3,1,4,1,6]
y.a = 2.71828
y.b = "Apres moi, le deluge"
y.c = z
z.a = [x, y, z]
z.b = range(12)
x.e = {'y': y, 'z': z}
objectBrowse(x)
def test(name, val):
return name == "a"
findChild(x, test)
# end
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